Sewing machine



y 4, 1953 M. CHINNICI 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet l INVENTOR CHINNICIATTORNEY July 14, 1953 cHlNNlc. 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 2 INVENTOR MICHAELCHINNICI ATTORNEY y 1953 M. CHINNlCl 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 3 ATTORNEY.

y 1953 M. CHlNNlCl 2,645,193

. SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 4 FIG. IO 34 FlWTFHTLHTTTYHIHH'I IN V EN TOR.

MICHAEL CHINNICI Y B flw/M ATTORNEY.

Patented July 14, 1953 V SEWING MACHINE Michael Ghinnici, Brooklyn, N.Y., assignor to Peerless Sewing Machine Corporation, New York, N. Y., acorporation of New York Application January 20, 1950, Serial No. 139,614

This invention pertains to improvements in stretched during the sewingoperation, and the resultant product, after the sewing operation iscompleted, is a sheet crimped alongits taped edge.

If desired, and as illustrated in the drawings, a band of lace may beinserted between the cloth and the tape during the sewing operation.

Further and other objects and advantages will be apparent from thespecification and claims, and from the accompanying drawings whichillustrate what is now considered to be a preferred embodiment of theinvention.

In the drawings: I

Figure 1 is a front view of the machine showing tape and lace being fedto the work support, through which a pair of side-by-side needlesreciprocate;

Fig. 2 is a View of Fig. 1 from the left, showing cloth, tape and laceas they are fed step-by-step under the needles;

Fig. 3 is a view on line 3-3 of Fig. 1 showing the shears for trimmingthe edge of the sheet, the mechanism for operating the movable shearblade, and the feed dog for feeding the cloth, tape and lace past theneedles;

Fig. 4 is a View on line 4-4' of Fig. 3;

Fig. 5 is a view on line 55 of Fig. 4 showing the fixed shearing blade,its means of support and its method of adjustment;

Fig. 6 is a view on line 6-6 of Fig. 4- showing the movable shearingblade and its supporting lever;

Fig. 7 is a view on line 1-1 of Fig. 4 showing the movable shearingblade, the chute for the cuttings, and the manually operable means forputting the movable blade out of shearing relationship with the fixedblade;

Fig. 8 illustrates a tape as it is being attached to a sheet of cloth bytwo lines of stitching, the waste edge of the cloth being cut away inadvance of the tape;

Fig. 9 is the same as Fig. 8 with the addition of a band of lace beingsewed between the cloth and the strip of elastic tape in order toproduce crimped cloth and lace; and

Fig. 10 is similar to Fig. 8, except that an edge of the tape extendssidewise beyond the edge of the cloth.

'- 2 Claims. (Cl. 112 12s) Referring to Fig. 2, the sheet of cloth 2D isbeing drawn towards the left over apron 18', along work. support 22 andunderneath a shoe 24 pivoted at 26 and urged downwardly by spring 28.

' The cloth is moved step-by-step by means of a feed dog, a portion ofwhich is shown at 30, Fig. 3.

A pair of spaced-apart needles 32 is reciprocated vertically through thecloth in synchronism with the cloth movement.

The tape 34 to be sewed to the cloth is fed from above over a supportingwire 36, past a guiding bracket 33, and through an opening in shoe 24 toa position on top of cloth 20 (Fig. 2).

Bracket 38 is provided with springs 40 manually settable by nuts 42,while the. machine is in operation, whereby the desired tension isproduced in the. tape.

If it be desired to sew lace, or the like, on top of the tape, the lace50 is guided over wire 52 between guide plates 54, 56, with tensioncontrolled by nuts 58 and springs 60, and thence past guide wires 62,64, to its position above cloth 20 and tape 34. I

If the tape be elastic, nuts 42 maybe adjusted so that the tape issomewhat stretched between bracket 38 and needles 32, whereby, after thetape has passed the needles and its tension is relieved,

the tape will contract to its normal length with the result that the.cloth is crimped, as indicated by the wavy lines 6% in Figs. 9 and 10.

Just in advance of the stitching operation the edge of the cloth issheared off parallel to the direction of travel, as will be, described,in order to insure a straight edge on the finished product.

The tape may be located with its edge even with the finished edge of thecloth as indicated in Fig. 8, or the tape edge may be on either side ofthe cloth edge. Fig. 10 shows the tape project: ing beyond the cloth.

Any uneven cloth edge is trimmed off by a pair of shears having astationary blade 68 and a pivoted blade 10, as shown in Figs. 1, 3, 4and 6, also in Fig. 5, which is a View of blade 68 from the rear inorder to illustrate its means of adjustment. The pivoted blade moves insynchronism with the cloth feeding device.

The fixed blade is adjustably mounted by a clamping screw 12 in aninclined slot 14 (Fig. 5) in the upper part of a member 16 rigidly, butadjustably, clamped at its lower end to frame 18 of the machine byscrews (Fig. 4).

Loosening of screws 80 permits close adjustment of member 16 and itsattached blade 68 by means of screw 82.

Pivotally mounted on a horizontal shaft 84 near the top of member 16 isa bell-crank lever 3 86 (Figs. 3, 4, 6 and 7) to the horizontal arm ofwhich is attached blade 10 and the waste chute 8B, which receives thetrimmings removed by the shears and discharges them onto stationarychute 89.

The horizontal upper arm of the bell crank 86 is bifurcated in suchmanner that the bifurcated tines span the rigid member 16 as best shownin Fig. 7. After bifurcated tine on the right side of member 16 in Fig.'7 carries the movable blade 10 and the chute 88 and is normally heldadjacent the member 16 so as to be in cutting relation to the fixedblade 68 mounted in said member 16. The other bifurcated tine which ison the left side of the member 16, as viewed in Figs. 4 and '7, ispressed against nut 90 by compression springs 92 surrounding the shaft84.

Referring to Figs. 4 and 6, it will be appreciated that member 86 may bemanually adjusted longitudinally on shaft 84 by nut 90 on the threadedend of shaft 84 to place movable blade 10 in proper cutting relationshipwith fixed blade 68, or entirely out of engagement, if desired.

Compression spring 92, surrounding shaft 34,

insures that contact between the blades is resilient.

Furthermore, the arrangement allows the operator, by turning nut 90,against the resistance of spring 92, to disable the shears by pushingbellcrank 86 to the right, thus putting blade 10 entirely out of cuttingrelationship with fixed blade 68.

Bell-crank 86 is actuated by eccentric 94 on shaft 96 (Fig. 3) throughbent arm 98 and an adjustable, eccentrically mounted, bearing 108 on thelower end of the depending arm of the bellcrank.

It is to be understood that the invention is not limited to the specificembodiment herein illustrated and described, but may be used in otherways without departure from its spirit as defined by the followingclaims.

What is claimed is:

1. In a sewing. machine having a work support, a needle adapted toreciprocate through said work support, and a feed dog for feedingsuperposed cloth and tape across said support under said needle: meansfor trimming the cloth edge so t at said edge will be in desiredrelationship to said tape, said trimming means including shears hav: inga fixed blade and a movable blade, a rigid member supporting said fixedblade, a horizontal shaft fixed in said member and projecting therefromat both shaft ends, a bell-crank supporting said movable blade normallyin shearing relationship with said fixed blade, means pivotally mountingsaid bell-crank on said shaft, means including a spring for biasing saidmovable blade toward said fixed blade, and means including an adjustablenut for moving said bell crank longitudinally of said shaft against saidbias and for moving said movable blade longitudinally away from saidfixed blade and out of shearing relationship therewith.

2. In a sewing machine having a frame, a work support, a needle adaptedto reciprocate through. said Work support, and means for feedingsuperposed cloth and tape across said support under said needle: meansfor trimming the cloth edge so that said edge will be in desiredrelationship to said tape, said trimming means including shears having afixed blade and a movable blade, a rigid member mounted on said frameand supporting said fixed blade, 2. horizontal shaft fixed in saidmember and projecting therefrom at both shaft ends, threads on one endof said shaft, a bell-crank supporting said movable blade normally inshearing relationship with said fixed blade, means pivotally mountingsaid bell-crank on said shaft, a spring around said shaft between 'saidrigid member and said bell-crank and biasing said movable blade towardsaid fixed blade, and a nut adjustably threaded to the threaded end ofsaid shaft, and retaining said bell-crank against said spring, said nutbeing so positioned that by moving it further onto said shaft, saidbell-crank will be correspondingly moved longitudinally of said shaftagainst the bias of said spring, and said movable blade may be movedlongitudinally away from said fixed blade and entirely out of shearingrelationship therewith.

MICHAEL CI-HNNICI.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 249,571 Baker Nov. 15, 1881 790,560 Nike May 23, 19051,111,339 Weis et a1 Sept. 22, 1914 1,353,534 Hughes Sept. 21, 19202,011,513 Carmichael Aug. 13, 1935 2,021,700 Pugach Nov. 19, 1935

